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Am 21.10.2014 um 19:11 schröbte Andre Arpin:
This post is long so I remove all quotes Note: the unexpected value of self when o.baz is invoked.
This is exactly the same problem as before: `o:baz()` involves two distinct operations: one `__index` call to retrieve the `baz` function, and finally one call to that `baz` function. The `__index` function and the `baz` function may (and in this case will) be called with different `self` arguments. You are trying to do all the work in the `__index` function alone:
setmetatable(getmetatable(metainstance.__index).__index, {
__index = function(self, key)
This `self` is always the same as `getmetatable(metainstance.__index).__index`, *not* `o`.
print(self, key, "self, key")
dump(self, 'self')
for k,v in pairs(self) do
print(k, v, 'k,v')
end
if key == "baz" then
print(type(self), (self).v)
return rawget(self,'v')
Here you are trying to access `o` (the object before the colon operator in `o:baz()`), but it is simply not available here. You have to return a function reference at this point, which in turn will be called with the `self` value you expect (i.e. `o`).
end
end,
})
Philipp